บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Biological control of Botrytis cinerea on kiwifruit through field applications of antagonistic microorganisms

Duncan, Roger Alan

Thesis of M.S., California State University, Fresno, 1991, 90 pages

1991

บทคัดย่อ

BIOLOGICAL CONTROL OF BOTRYTIS CINEREA ON KIWIFRUIT THROUGH FIELD APPLICATIONS OF ANTAGONISTIC MICROORGANISMS (BACILLUS SUBTILIS, CRYPTOCOCCUS LAURENTII, AUREOBASIDIUM PULLULANS).

Twelve isolates of microorganisms were screened in the laboratory for antagonism against Botrytis cinerea.  Many inhibited or significantly reduced in vitro conidial germination and mycelial development, and also reduced incidence and severity of decay in inoculated kiwifruit.  Bacillus subtilis, Cryptococcus laurentii, and Aureobasidium pullulans were applied in three kiwifruit vineyards at bloom and preharvest, or postharvest to reduce gray mold storage decay.  The yeast antagonists survived well on the kiwifruit in the field and in storage.  Senescent stamens sampled from fruit treated with a bloom application of C.  laurentii harbored fewer quiescent B.  cinerea infections (P = 0.10) than untreated fruit, a reduction similar to the vinclozolin (Ronilan 50W) treatment.

 Despite low levels of disease in untreated fruit, field applications of B.  subtilis and C.  laurentii in mixture significantly reduced incidence of gray mold storage decay in one field trial (P = 0.10), exhibiting results comparable with vinclozolin.